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(No Model.)

L. B TBBBETTS; O. H. POPE & J. A. STEWART.

PLOW.

No. 404,320. PatentedMay 28, 1889.

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UNITED STATES PATENT OFFICE.

LEIVIS B. TEBBETTS AND CHARLES H. POPE, OF ST. LOUIS, MISSOURI, AND JOHN A. STEl/VART, OF HOUSTON, TEXAS, ASSIGNORS TO DEERE, MANSUR & co, on ST. LOUIS, MISSOURI.

PLOW.

SPECIFICATION forming part of Letters Patent No. 404,320, dated May 28, 1889. Application filed April 4, 1887- Serial No. 233,583. (No model.)

, To all whom it may concern.-

Be it known that we, LEWIS B. TEBBETTS and CHARLES H. POPE, of St. Louis, Missouri, and JOHN A. STEWART, of Houston, Texas, have jointly made a new and useful Improvement in Plows, of which the following is a full, clear, and exact description.

The improvement relates to double-mold-v board plows, Such as lister or middle breaking- IO plows. Its principal features are the depressed center bar, the removable point upon the center bar, and the removable shares, substantially as shown in the annexed drawings, making part of this specification, and exhibiting I 5 the most desirable method of carrying out the improvement, and in which- Figure 1 is a central vertical longitudinal Section of the lower portion of the plow. Fig. 2 is a rear elevation of the parts of Fig. 1. Fig. 3 is a view in perspective of the plow. Figs. 4, 5, 6, 7, 8, and 9 are details upon an enlarged scale, Fig. 4: being a plan of the center-bar point in position, Fig. 5 a bottom view of the same, and Fig. 6 a side elevation of 2 5 the same. Fig. 7 is a section on the line 7 7 of Fig. 6. Fig. 8 is a Side elevation of the forward end of the center bar, the point being removed; and Fig. 9, a side elevation of the point upon the center bar, but showing 0 a modification in the mode of attaching it to the center bar.

The same letters of reference denote the same parts.

In the present construction the center bar, 5 A, of the plow is below the lower edge, I), of the shares B, and it extends from its point of junction, at, with the handles 0 0 forward beneath the shares B to a considerable distance in advance of the point I) of the shares, substantially as represented at-a'. A center bar thus depressed is of use in preventing the plow from slipping sidewise and in steadying the movement of the plow, thereby making the plow easier to manage and the work to be better done. This end is still more effectually attained by extending the depressed center bar to the front of the Shares, as described.

D represents the removable point upon the forward end of the center bar. This lastnamed part in use is liable to wear away, and therefore in the place of simply extending the center bar to the front of. the shares we provide the center bar with an end piece, termed a point, which as it becomes worn can be removed from the center bar and a new point attached in its place. The point D can be attached to the center bar in various ways. It can,'for instance, be riveted or bolted to the center bar. We, however, prefer the method shown more distinctly in Figs. 5, 6, and 7that is, a dovetail construction carried out by channeling the center bar at a at both Sides of the center bar, and providing the point D with flangesd cl, which are adapted by slipping the point longitudinally onto the center bar to engage in the channels a (L as shown. In Fig. 6 the channels are extended horizontally; but they may be eX- tended as shown in Fig. 9. It is also desirable to protect the sides a of the center bar at its extreme end, and this can be done by extending the flanges d d downward, as shown at d. The point D is made to be driven longitudinally onto the center bar, so as to be held thereon, to which end the center bar may be tapered and the point-flanges correspondingly constructed to enable the point to be driven the desired distance onto the center bar and there held; or the point D may be closed at its forward end at (Z to thereby form a Shoulder, which can come against the tip of the center bar and prevent the point from being moved farther onto the center bar. The shoulder d is also of use as a guard to the tip of the center bar, for which purpose the shoulder may or may not bear closely against the center bar. Another feature of the improvement is making that part of the construction termed the share in two parts, B B, which, in addition to being separable from the mold-board and from the point D, are Separable from each other. Heretofore it has been customary in double-mold-board plows to make the two shares B B and point all in one piece, and in consequence of such practice it is so difficult to repair the part as to preclude its being done economically and by other than very skilled workmen, and provided with appliances not usually found, saving in large workshops. By means of the present improvement this difficulty is overcome. The shares B B are each of such a simple shape as to permit of them being readily made in almost any locality and with tools of a simple character, and by detaching the bolts b the shares or either of them can be removed from the remainder of the construction, repaired, and replaced, or new shares substituted therefor. The mold-board and shares are all attached to the standard F by means, preferably, of the saddle G, the mold-board and shares being bolted to the saddle by means of the bolts 6 e and bl), respectively, and the saddle being secured to the standard by means of the bolts g. The point of the combined shares l3 B is preferably inserted in a socket, II, formed byfiaring the rear end of the point D upward from the center bar. The moldboard and shares can as a single piece be held permanently in the same position upon the plow-frame, or they can be turned vertically in the socket and the rear end be raised and lowered upon the standard, to which end the socket is su'lliciently large, and the lugs g of the saddle are slotted at 1 substantially as shown.

An advantage accruing from being able to r is pulverized, and the better the plow is adapted for loose soils. The lower the rear end of the mold-board is raised the less the earth is thrown and broken up, and the plow is better adapted for stiff soils.

YVe claim 1. A double-mold-board plow having its center bar depressed and extended in front of the share and provided with the removable point, said point having a lip which laps upon the nose of the mold-board, as described.

2. The combination of the channeled center bar and the point D, having the flanges (Z d and shoulder (F, as described.

The combination of the channeled center bar and the point 1), having the flanges (Z (1 extended at d, and the shoulder (Z as described.

4. The combination of the mold-board, the shares, the standard, and the socket, said mold-board and shares as one piece being adjustable upon the standard, as described.

LEXVIS l3. TE il-EETIT'JTS. CHARLES ll. POPE. JOHN A. STE\VART.

\Vitncsses:

Geo. W. SUTHERLAND, A. T. STEVENS. 

